Collapsible core



A. H. HARRIS.

COLLAPSIBLE (JOEE.

APPLICATION mu) lUNEZI. 1918.

1,343,504. Patented June 15, 1920.

ARCHER H. HARRIS, OF BARBERTON, OHIO.

COLLAPSIBLE CORE.

Application filed June 27,

To all whom i} may concern.

Be it hnowh that I, Ancnnn H. HARRIS, a citizen of the United States, residin at Barberton, in the county of Summit, State of Ohio, have invented certain neu and useful lm n'ovements in Collapsible Cores, of which the following is a specification.

This invention relates to a form of cl llapsible core for use in the manufacture of automobile tires, which cores are designed to be taken apart for removal from the easing alter vulcanization. It is the purpose of the invention to ctmstruct a core which shall be easy to collapse and reassemble without the use of screws or bolts, making use of a solid ring which may be easily titted onto the core and will maintain the core assembled and may be easily removed.

Figure 1 a plan view of a core in as semblcd position.

l ig. 2 is a cross section on the line 2- .2 of Fig. 1.

The core is made into any suitable number of parts, preferably four, being divided along radial lines 1 and along tal'lgental lines 2 so that the part It may first be removed inwardly of the tire and then the parts 4, 5 and 6. Between the parts there is provided a. tongue and groove onnection 7. This construction is common to all col laltisible tire cores.

On all sections of the core there is formed the tongue 8 each part of which carries a. lateral rib or projection 9 spaced from the inner edge thereof, over which is adapted to be placed the continuous ring 10 which serves to hold. the core sections in place by means of a groove or channel on its under side which mates with ribs. The rib 9 is tapered out 'ardly from the core at an angle small enough so that the ring will be held in place by the \vcdging action of the two surfaces without the necessity ol providing bolts, screws or other mechanical. fastening to hold it in place. This is preferably an angle of 'lffalthough the angle may be made greater or less it found practicable. The ring i may, therefore, be called a friction ring as it holds the core together by friction alone, the core alter being assembled, being held together without any mechanical fastening whatever. Between the lower inside edge of the ring and tongue there is a narrow space 11 into which a lever Specification of Letters Patent.

Patented June 15,1920.

1918. Serial No. 242.205.

may be inserted for the purpose of prying off the ring. 7

The core designed by me is easily operated and presents advantages over cores in use at the present time. It is not desired that the invention herein be limited to the details shown, as it is possible to make alterations within the scope of the claims without-sacrilining any of the benefits of the invention.

1 claim:

1. A core composed of a plurality of separable segments, a tapered projection on each segment, and a one piece ring adapteo lo lit over the projections to hold the segments ol the core together, the underside of said ring having a tapered groove to fit the projections, the taper of the projections and ring being such that the parts may be held together by friction alone without rotation of the ring.

2.. A core composed of a plurality of separable segments, a tongue on each segment, a projection on each tongue, a solid ring adapted to fit over the projections to hold the segments of the core together, the underside of said ring having an endless groove to lit the projections, the groove and projections being correspondingly tapered at an angle such that the parts may be held togcther by friction alone.

:3. A core composed of a plurality of separable segments, a ton ue on each segment, a rib on each tongue, the ribs when brought together Forming a. complete circle, a ring having a. groove to lit the circular rib, the

groove and the rib being correspondingly tapered at an angle such that the parts are held together by friction alone, a space being provided between the rib and the core serving as a purchase for a lever for removing the ring.

4-. A core composed of a plurality of separable segments, a tongue on each segment, a. rib on each tongue spaced outwardly from the inner edge thereof, the ribs when brought together forming a complete circle, a. ring provided with a groove on its underside to lit the rib. the groove and the rib being corrcs|)ondingly tapcrcd at an angle such that the parts are held together by l'riction alone. the lower edge of the ring being spaced from the tongue of the core to provide a space serving as a purchase for a lever for removing the ring.

5. A core comprising a plurality of separable segments, a lateral projection on each segment, a friction ring adapted to tit over said projections and provided with u virenlui' groove, the said projections having surfaces which eonverge, und the Hilltl groove being provided with sin-faves \\'lllt'll tit over the converging slll'l'nt'es on Hllltl projel-tiom to hold said core in assembled relation.

6. A eoi e eomprising a plurality of separable segments, lateral projeetious on the segments lot-nted on one side of said (ore only, a single ring provided with a channel on one of its plune surlm-es, the sides of the projections eonrerging. and the sides of the groove being adapted to lit over the projee tions and nmintuin the core in assembled relation without being meeluluienlly fastened thereto.

7. A eore comprising :1 plurality 01 sep arable segments, a luternl rih on each segment, the ribs being in the form of ares of the Hlllllt eircle, :1 channel ring having a vhunnel on one of its llut sides concentric with the ribs when the core is in assembled eonditiom the sides: of the ribs and the sides of the channel converging at such an angle that when assembled the core will be held together without being meelmnieally fastoned.

AI- QI'IER H. HARRIS. 

